Title
Late Ordovician channel-dwelling crinoids from southern Ontario, Canada
Title Variants
Alternative:
Channel-dwelling crinoids
Related Titles
Series:
American Museum novitates, no. 2665
By
Haugh, Bruce N.
Type
Book
Material
Published material
Publication info
New York, N.Y, American Museum of Natural History, c1979
Notes
Title from caption
"January 5, 1979."
"Rheocrinus aduncus, new genus, and new species, subclass Camerata, and Parisocrinus mulletensis, new species, subclass Inadunata, occurr in a late Ordovician (Richmondian) submarine channel fill in the Georgian Bay Formation. This occurrence greatly extends the stratigraphic ranges of the respective families, Anthacocrinidae and Ampheristocrinidae, thereby providing morphologic and temporal support to proposed evolutionary relationships of the foregoing families with the Rhodocrinitidae and Cyathocrinitidae, respectively. Unusual morphological features of R. aduncus indicate that it could form an inclined, parabolic filtration baffle, as do certain living stalked crinoids. A vertically held, planar baffle is suggested for P. mulletensis. These species are believed to have occupied two distinctive microhabitats defined by feeding level, current energy, and feeding mode. They are presently the oldest known channel-dwelling crinoids, and contain among the oldest three dimensional preserved internal organs"--P. [1].
Subjects
Crinoidea, Fossil
,
Echinodermata, Fossil
,
Ontario
,
Ordovician
,
Paleontology
,
Parisocrinus mulletensis
,
Rheocrinus aduncus
Call Number
QL1 .A436 no.2665, 1979
Language
English
Identifiers
LCCN:
https://lccn.loc.gov/79101838
OCLC:
4882782801231
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